This Law regulates the way of achieving public procurement, the procedures for awarding public procurement and contracts for the winners of tenders for public procurement, the specific tools and techniques that can be used for the awarding of public procurement contracts, as well as certain specific aspects in relation to execution of public procurement contracts. The principles underlying the awarding of contracts shall be as follows: (a) non-discrimination; (b) equal treatment; (c) acknowledgement; (d) transparency; (e) proportionality; and (f) assumption of responsibility. Bidder shall be intended any economic operator that submitted an offer in the framework of an award procedure. Offer shall be intended the legal act by which the economic operator manifests his will to engage from a legal point of view in a public procurement contract. The offer includes the financial proposal, the technical proposal, as well as other documents established by the award documentation.